Is probably the number one goal of cosmologists today .

可能是宇宙学家现在排在第一号的对象。

Some cosmologists think this expansion will leave the milky way galaxy as an " island universe " in a few trillion years with no other galaxies visible .

一些宇宙学家认为这种膨胀将使得银河系在接下来的几万亿年里变成一个宇宙岛并且将没有其它可见的星系。

The existing amounts of hydrogen and helium match theory perfectly - so well , in fact , that cosmologists claim this is the best evidence we have for the big bang .

氢和氮所存在的总量与理论计算匹配得很理想实际上，它好得让宇宙论的学者声称这就是宇宙起源于大爆炸的最好证据。

An assumption that remained dominant among physicists and cosmologists for many years .

很多年来，这个设想在物理学家和宇宙学家中间仍然占有着主导的地位。

The task for the next 70 years is for physicists , astronomers and cosmologists to discover exactly what it is .

未来70年的任务将是由物理学家、天文学家和宇宙学家们共同探索暗物质究竟是什么。